Waterproof cast protector



FIG. 1 is a perspective view of a waterproof cast protector showing my new design;

FIG. 2 is an end elevational view thereof;

FIG. 3 is an elevational view of the opposing end thereof; and,

FIG. 4 is a top plan view, bottom plan view, and all side elevational views thereof being identical thereto.

The broken line showing of a limb is included for the purpose of illustrating environmental structure and forms no part of the claimed design. 

I claim the ornamental design for a waterproof cast protector, as shown and described. 